Question

One disadvantage of aquaculture is that:

a. it meets only one-fifth of the total demand for fish

b. farmed fish eat chow made from wild-caught fish

c. it utilizes excess water

d. enclosures are too costly to build

e. few food crops grow underwater

Answer 1

Ans.  Aquaculture is a form of farming where fishes are raised in a captive environment mainly for the purpose of human consumption and for other human requirements. This type of fish farming is possible anywhere, may it be a freshwater lake,water tanks or in a captive cage in ocean etc. Aquaculture accounts for about half of the total fish consumption worldwide.Aquaculture can be of extensive type where the fishes feed upon internal food source derived out aquatic organism and intensive type where the fishes are fed with food that is supplied externally.

Eventhough there are many advantages of aquaculture, some disadvantages too prevail in such type of captive farming of fishes, one being the setup cost. Inorder to start a fish farming,the fish farmer must setup a cage in the sea or lake intended to use for farming.This is expensive, especially in saltwater oceans. Apart from this, there are various other factor's which need to be taken care of, like feed for fishes, maintenance of cages,preventition and control of diseases,transport etc.

Hence, given the option, the correct one is (d)Enclosures are too costly to build